SL6440

HIGH LEVEL MIXER

The SL6440 is a double balanced mixer intended for use in

radio systems up to 150MHz. A special feature of the circuit

allows external selection of the DC operating conditions by

means of a resistor connected between pin 11 (bias) and Vcc

When biased for a supply current of 50mA the SL6440 offers

a 3rd order intermodulation intercept point of typically

+30dBm, a value previously unobtainable with integrated

circuits. This makes the device suitable for many applications

where diode ring mixers had previously been used and offers

the advantages of a voltage gain, low local oscillator drive

requirement and superior isolation.

FEATURES

s

+30dBm Input Intercept Point

s

+15dBm Compression Point (1dB)

s

Programmable Performance

s

Full Military Temperature Range (SL644A)

APPLICATIONS

s

Mixers in Radio Transceivers

s

Phase Comparators

s

Modulators

ORDERING INFORMATION

SL6440 A DG

SL6440 C DP

Fig.1 Pin connections - top view

DG16

DP16

Min.

Typ.

Max.

Signal frequency 3dB point

100

150

MHz

Oscillator frequency 3dB point

100

150

MHz

3rd order input intercept point

+30

dBm

Third order intermodulation distortion

-60

dB

Two 0dBm input

Second order intermodulation distortion

-75

dB

Signals

1dB compression point

15

dBm

Noise figure

11

dB

Fig.8 test circuit

Conversion gain

-1

dB

50

Ω load Fig.2

Carrier leak to signal input

-40

dB

Test circuit Fig.8

Level of carrier at IF output

-25

dBm

See applications information

Supply current

7

mA

60

mA

Local oscillator input

100

250

500

mV rms

Local oscillator input impedance

1.5

k

Ω

Signal input impedance

500

Ω

Single ended

1000

Ω

Differential

Characteristic

Units

Conditions

Value

NOTE

ELECTRICAL CHARACTERISTICS

Test condltions (unless otherwise stated):

°C to +125°C (SL64440A), -30°C to +85°C (SL6440C)

Local oscillator input level = 0dBm; Test circuit Fig.2.

ABSOLUTE MAXIMUM RATINGS

Supply voltage and output pins

15V

Maximum power dissipation

1200mW

(Derate above 25

°C: 8mW/°C)

Storage temperature range

-65

°C to +150°C

Programming current into pin 11

50mA

THERMAL CHARACTERISTICS

Thermal resistance:

125

°C/W

Time constant: Junction-Ambient

1.9 mins

Maximum chip temperature

150

°C